Create a typography system for an elder-care brand with a {{visual_style}} visual direction, written in a {{tone}} tone for {{target_audience}} on {{platform}}. Output must include: Typography Strategy, Type Selection, Type Scale, Responsive Typography, Paragraph & Text Block Styling, Typography in UI Components, Accessibility Requirements. Keep under 1800 words. All sizes in rem with px equivalents at 16px base. All CSS must be valid. If a font license is unknown, mark as LICENSE_UNAVAILABLE. Paste any relevant background information after these instructions before running.